-/*
- * JNI interface to C code for MSG.
- *
- * Copyright (c) 2006-2013. The SimGrid Team.
- * All right reserved.
- *
- * This program is free software; you can redistribute
- * it and/or modify it under the terms of the license
- * (GNU LGPL) which comes with this package.
- */
+/* JNI interface to C code for MSG. */
-package org.simgrid.msg;
+/* Copyright (c) 2006-2014. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.io.File;
+package org.simgrid.msg;
+import org.simgrid.NativeLib;
public final class Msg {
- /* Statically load the library which contains all native functions used in here */
- static private boolean isNativeInited = false;
- public static void nativeInit() {
- if (isNativeInited)
- return;
- try {
- /* prefer the version on disk, if existing */
- System.loadLibrary("simgrid-java");
- } catch (UnsatisfiedLinkError e) {
- /* If not found, unpack the one bundled into the jar file and use it */
- loadLib("simgrid");
- loadLib("simgrid-java");
- }
- isNativeInited = true;
- }
- static {
- nativeInit();
- }
- private static void loadLib (String name) {
- String Os = System.getProperty("os.name");
- String Arch = System.getProperty("os.arch");
- // Some OS/Arch may be different between Java and Cmake,
- // which generated the path
- if (Os.toLowerCase().startsWith("win"))
- Os = "Windows";
- else if (Os.contains("OS X"))
- Os = "Darwin";
- if (Arch.equalsIgnoreCase("x86"))
- Arch = "i386";
- else if (Arch.equalsIgnoreCase("x86_64"))
- Arch = "amd64";
- String Path = "NATIVE/" + Os + "/" + Arch + "/";
-
- String filename=name;
- InputStream in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
-
- if (in == null) {
- filename = "lib"+name+".so";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = name+".dll";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = "lib"+name+".dll";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = "lib"+name+".dylib";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- throw new RuntimeException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
- }
-// Caching the file on disk: desactivated because it could fool the users
-// if (new File(filename).isFile()) {
-// // file was already unpacked -- use it directly
-// System.load(new File(".").getAbsolutePath()+File.separator+filename);
-// return;
-// }
- try {
- // We must write the lib onto the disk before loading it -- stupid operating systems
- File fileOut = new File(filename);
-// if (!new File(".").canWrite()) {
-// System.out.println("Cannot write in ."+File.separator+filename+"; unpacking the library into a temporary file instead");
- fileOut = File.createTempFile("simgrid-", ".tmp");
- // don't leak the file on disk, but remove it on JVM shutdown
- Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(fileOut.getAbsolutePath())));
-// }
-// System.out.println("Unpacking SimGrid native library to " + fileOut.getAbsolutePath());
- OutputStream out = new FileOutputStream(fileOut);
-
- /* copy the library in position */
- byte[] buffer = new byte[4096];
- int bytes_read;
- while ((bytes_read = in.read(buffer)) != -1) // Read until EOF
- out.write(buffer, 0, bytes_read);
-
- /* close all file descriptors, and load that shit */
- in.close();
- out.close();
- System.load(fileOut.getAbsolutePath());
- } catch (Exception e) {
- System.err.println("Cannot load the bindings to the simgrid library: ");
- e.printStackTrace();
- System.err.println("This jar file does not seem to fit your system, sorry");
- System.exit(1);
- }
- }
- /* A hackish mechanism used to remove the file containing our library when the JVM shuts down */
- private static class FileCleaner implements Runnable {
- private String target;
- public FileCleaner(String name) {
- target = name;
- }
- public void run() {
- try {
- new File(target).delete();
- } catch(Exception e) {
- System.out.println("Unable to clean temporary file "+target+" during shutdown.");
- e.printStackTrace();
- }
- }
- }
- /** Retrieve the simulation time
- * @return The simulation time.
- */
- public final static native double getClock();
- /**
- * Issue a debug logging message.
- * @param s message to log.
- */
- public final static native void debug(String s);
- /**
- * Issue an verbose logging message.
- * @param s message to log.
- */
- public final static native void verb(String s);
-
- /** Issue an information logging message
- * @param s
- */
- public final static native void info(String s);
- /**
- * Issue an warning logging message.
- * @param s message to log.
- */
- public final static native void warn(String s);
- /**
- * Issue an error logging message.
- * @param s message to log.
- */
- public final static native void error(String s);
- /**
- * Issue an critical logging message.
- * @param s message to log.
- */
- public final static native void critical(String s);
+ /** Retrieves the simulation time */
+ public static final native double getClock();
+ /** Issue a debug logging message. */
+ public static final native void debug(String msg);
+ /** Issue a verbose logging message. */
+ public static final native void verb(String msg);
+ /** Issue an information logging message */
+ public static final native void info(String msg);
+ /** Issue a warning logging message. */
+ public static final native void warn(String msg);
+ /** Issue an error logging message. */
+ public static final native void error(String msg);
+ /** Issue a critical logging message. */
+ public static final native void critical(String s);
+
+ private Msg() {
+ throw new IllegalAccessError("Utility class");
+ }
/*********************************************************************************
* Deployment and initialization related functions *
*********************************************************************************/
- /**
- * The natively implemented method to initialize a MSG simulation.
+ /** Initialize a MSG simulation.
*
* @param args The arguments of the command line of the simulation.
*/
- public final static native void init(String[]args);
-
- /**
- * Run the MSG simulation.
- *
- * The simulation is not cleaned afterward (see
- * {@link #clean()} if you really insist on cleaning the C side), so you can freely
- * retrieve the informations that you want from the simulation. In particular, retrieving the status
- * of a process or the current date is perfectly ok.
- */
- public final static native void run() ;
+ public static final native void init(String[]args);
- /** This function is useless nowadays, just stop calling it. */
- @Deprecated
- public final static void clean(){}
+ /** Tell the kernel that you want to use the energy plugin */
+ public static final native void energyInit();
- /**
- * The native implemented method to create the environment of the simulation.
- *
- * @param platformFile The XML file which contains the description of the environment of the simulation
+ /** Run the MSG simulation.
*
+ * After the simulation, you can freely retrieve the information that you want..
+ * In particular, retrieving the status of a process or the current date is perfectly ok.
*/
- public final static native void createEnvironment(String platformFile);
+ public static final native void run() ;
- public final static native As environmentGetRoutingRoot();
+ /** Create the simulation environment by parsing a platform file. */
+ public static final native void createEnvironment(String platformFile);
- /**
- * The method to deploy the simulation.
- *
- *
- * @param deploymentFile
- */
- public final static native void deployApplication(String deploymentFile);
-
- /** Example launcher. You can use it or provide your own launcher, as you wish
- * @param args
- * @throws MsgException
- */
+ public static final native As environmentGetRoutingRoot();
+
+ /** Starts your processes by parsing a deployment file. */
+ public static final native void deployApplication(String deploymentFile);
+
+ /** Example launcher. You can use it or provide your own launcher, as you wish
+ * @param args
+ * @throws MsgException
+ */
static public void main(String[]args) throws MsgException {
/* initialize the MSG simulation. Must be done before anything else (even logging). */
Msg.init(args);
/* Execute the simulation */
Msg.run();
}
+
+ /* Class initializer, to initialize various JNI stuff */
+ static {
+ org.simgrid.NativeLib.nativeInit();
+ }
}
